Engine governor



Ju e5,1945. M. MALLORY 2,377,567.

ENGINE GOVERNOR Filed Oct. 19, 1944 INVENTOR.

Mar/00 Mafia/y Patented June 5, 1945 N ED pgsrArss PATEN TOFFICE 7 ENGINE GOVERNOR; Marion Mallory, Detroit, Mich. Application October 19, 1944, Serial No. 559,422 8 Claims. (cr es-103) i This invention relates to an engine governor and more particularly to a governor for controlling 7 the speed of an internal combustion engine.

It is the object of this invention to produce a governor which will effioiently and accurately control the speed of an internal combustion engine and which can be readily andeasily adjusted to control the engine at any speed desired within a wide range of speeds. 7

The single figure is a view partlyin section showing my governor.

The elements ofmy governor are as follows: intake passageway for the motive fuel I, inlet end 2 and outlet end 3 to the engine of the intake passageway, governor valve 4 controlling fiuid fiow through intake passageway I, throttle shaft 5, crank arm 6 fixed on shaft 5, spring I connected at one end to crank 6 and at the other end to lug 8 on the intake passageway housing, cylinder 9, piston l0, flexible or leather seals ll onpiston l0, air vent to atmosphere in cylinder 9, connecting rod l3 between crank arm 6 and piston l0, conduit l4 connecting cylinder 9 into the intake passagewayl "at orifice l on the atmosphere side of valve 4, conduit 16. connected into the intake passageway l at orifice IT on the engine side of valve 4,-branch7conduit l8 connecting conduit 16 into cylinder 9 and suction chamber I9, cylinder 20 communicating withconduit [6 through orifice 2i, cylindrical sleeve-22 slidably adjustable within stationary cylinderZfl, crank 23 fixed on screw 24 having a screw fit with the end of cylinder 20 as7at 25,7flange 26 on the innerend of screw 23 journaled in the right hand end of sleeve 22 as at 21, openings 28 throughflange 26, slide valve 29 mounted within leeve22, centrifugal weights30 pivotally connected by links 3| with ears 32 on shaft 33 driven by or in accordance with the speed iof the engine or vehicle, links 34 pivotally connecting weights 30 with collar 35 ders31, 38, (stub shaft 36, shoulders 31, 38and valve 29 are preferably one piece), opening 39 in the end of shaft 33 inwhich stub shaft is -journaled, pin 40 passing through slot in sleeve der 20, groove ,44 communicating with orifice 43 and with orifice 45 in sleeve 22, diametrical passageway 46, axial passageway 41 in Valve 29, com- 7 pression spring 50. 7

@The operation of my governor is a follows:

Assumingthat-the engine (not shown) is running ut has'not reached speed suificient to cause the i which is journaled on stub shaft 36 between shoulexpansion of the centrifugal governor 3U, 34 to move orifice 46 out of communication with opening'45in sleeve 22, that is, the parts will be in the position shown in the drawing. At this time the suction chamber [9 will be bled to atmosphere through orifice 43, groove 44, opening 45, passageway 46, 41, orifices 28, 2|; conduits I6and l8 so that pressure in chamber l9 will besubstantially atmospheric and spring 1 will hold governor valve4 open. When the speed increases the centrifugal governor 30, 34 will'move valve 29 toward the left so that passageway 46 will be offset or positioned towardthe left b'eyond orifice 45 and valve 29 will close off orifice 45, shutting off the air bleed to suction chamber I97 and the suction or vacuum will rise (that is, the pressure will fall) in chamber I9 causing piston ID to move toward the right and thereby moving governorvalve 74 toward closed position against the tension f spring 1. This will cause the speed of the engine to fall slightly whereupon compression spring 50 will contract centrifugal weights 30 and move valve29 tothe right until passageway 46 is partially or completely in communication with orifice 45 thereby partially or completely bleeding down the vacuum in chamber l 9 and permitting spring "l to partially or completely open valve 4 to in- 7 chamber 19 at an engine speed of 2500 R. P. M.

andit' was desired to govern the engine at a higher speed. To accomplish this screw 24 would be turned inwardly or toward the left by crank 23 which would move orifice 45 toward the left and now centrifugal governor30, 34 would have to expand a greater distance before orifice 45 would be disconnected from passageway46 and closed to shut off the air bleed to suction chamber l9. The engine would thenbe governed at a higher speed. 7 If crank 23 is turned to move sleeve 22 toward the right in the drawing, then the engine would be governed at a lower speed because centrifugal weights 30: would close orifice 45 earlier or at a lower engine speed.

As the centrifugal governor 30 moves valve 29 to the left to close air bleed orifice 45, the vacuum in valve chamber 5| tothe right of valve 29 opposes the centrifugal governor 30. This vacuum exerts itself over an area equal to the area of the right hand end or face, of valve 29. Thusfas centrifugal weights 30 respond to engine speed to move valve 29 to theleft to closeair bleed 45, the centrifugal force of the weights is opposed by i spring 50 and also by the manifold suction which is established in chamber 5| and acts upon valve 29, Thus valve 29 will only close momentarily as the engine reaches its governed speed and then will open slightly and ride the vacuum so that valve 4 will be actuated in response to load conditions and hold the engine at its governed speed. These operating conditions cause the governor system to govern the engine speed without substantial surging of the, engine-speed as load con.- ditions change. v i

I claim:

1. A governor for an internal combustion engv gine having an intake passageway comprising a valve for controlling the flow of motive fluid through said passageway, a suction actuated device connected to said governor valve for imparting movement thereto, a conduit connecting saidsuction actuated device with the intake. passage- Way on the engine side of said governor valve, an air bleed for saidsuctiondevice, a valve con-- trolled. in accordance with. engine speed for controlling said. air bleed, said valve closing at a predetermined engine speediwhereby said suction device; moves. said governor valve toward closed position, and. means for adjusting the relative position of said. air bleedand' valveto change the speedatwhic'h the valve closes said airloleed.

.2; A, governor for an internalficombustion engine having. an intake; passageway comprising a valve for controlling the flow of motivefiuid throughsaid passageway, a suction actuated desuction device, an air-bleed passageway leading from the suctionchamber of said suction device and having an air inlet, a valve controlled in accordance with engine speed "for controlling said airjbleed' passageway,. said valve closing as the engine reaches its governed speed whereby. said suction. devicemoves the governor, valve toward closed position, and means for changingthe. position of the air bleed. inletrelative to said speed controlled valve whereby the speed at which the valve closessaid air bleed. ischanged, I

"3. A governor for an internal combustionengine having, an; intake passageway comprising a valve for controlling the flow of motive fluid through said passageway, a suction actuated device connected to said governor ,valve for imparting movement thereto, a conduit connecting said suction. actuated devicewith the intake passageway. onthe, enginesideofl said governor valve wherebythe suction actuated device moves said governor valve. toward closed position when the suction in the intake passagewayorrthe engine side of; said governor valve is. imposed upon said suction. device, a valve housing having an air inlet, a conduit. connecting. saidovalve housing with the: suction chamber of said suction device, a: valve controlled: inaccordance with the engine spedand"positioned'insaid valve housing for controlling communication between the air-inletand the-said conduit; said-valve closing said. air. inlet at a predetermined engine speed whereby said suction device moves the governor valve toward closed position, and me ans'for adjusting the valve housing relative to the speed controlled. valve to in said valve housing for controlling communication between the air inlet and the said conduit, centrifugal means controlling said valve in accordance with the engine speed, said centrifugal means; actuating said valve to close said air inlet at a. predetermined engine speed whereby said suction device moves the governor valve toward closed position, and means. for adjusting the valve housing relative to the'valveto'change the engine speed at which the valve closes said air inlet. i

governor for an internal combustion engine: having an intake passageway comprising a valvefor controlling the flow of motive: fluid throughsaid passageway, a suctionactuated device connected to said governor valve for imparting;movement.thereto; aconduit connecting said suction actuated device with: the intake passageway on the; engine side of said governor valve,

avalve housing; having an air inlet and an air outlet, a conduit, connecting the said! outlet with thesuction chamber of. said suction device,.a.valve controlled! in accordance.- with the, engine speed andgpositionedi insaid: valve: housing, said valve having. a passageway itherethrough whereby in one; positionrofsaid valve the passageway communicatesz withthe air. inlet. and air. outlet. for said. valve housing to bleed: thev suction: device and: whereby in another position of said; valve the: passageway is disconnecte d from the air inlet tolc'ut 01f" the air" bleed to. said suction chamber, and'means-ior adjustingitheairinlet. in said valve housing relative to the passageway in. said speed controlled: valve to change the engine speed at which. thevalve-i closes said: air inlet. and thereby change the governedv speed: of the engine.

61. governor for aninternal. combustion: en;-

gine having an intake passageway comprising; a

throttle valve forcontrolling the flow of. motive fluidthrough said passageway; asuction actuated device connected to said throttle: valve for imparting' movement thereto, a conduit connecting said suctionv actuated devicewith-the intake passageway on the engine side of the throttlevalve, an air bleed: onifice for said suction device, a slidable valve' controlled' in accordance with the engine speed for controlling said air bleed orific'e, said valve sliding relative tosai'd ai'r bleed orifice in. opposition to the intake passageway. suction toclos'e said air bleed orifice; said'valve tending t'oclose said air ble'ed'orifice at a predetermined engine speed whereby said suction device moves said throttle valvetoward closed position, and means for adjusting" the relative position of said air bleed orifice and the slidttblevalve to change the speed at which the slidable valve closes said air bleed orifice. i

7-. A governor for an internal combustionen'- gine having an intake passagewaymomprising a throttle valve for controlling the fiowof motive fluidithrough said passageway, a-suctionactuated- :device connected: to'said throttle valve for im parting movement thereto, a conduit connecting said suction actuated device with the intake passageway on the engine side of said throttle valve, a cylinder having an air bleed orifice, a reciprocating valve in said cylinder for controlling said air bleed orifice, a centrifugal governor connected to, said reciprocating valve for controlling the opening and closing of said valve in accordance with the engine speed, a conduit connecting the cylinder with said suction device whereby the centrifugal governor moves said air bleed valve toward open position in opposition to the intake passageway suction, said centrifugal governor tending to close said air bleed valve at a predetermined engine speed whereby said suction device moves said throttle valve toward closed position, and means for adjusting the cylinder and air bleed orifice relative to said air bleed valve to change the engine speed at which the valvecloses said air bleed orifice.

8. A governor for an internal combustion engine having an intake passageway comprising a valve for controlling the flow of motive fluid through said passageway, a suction actuated device connected to said governor valve for imparting movement thereto, a conduit connecting said suction actuated device with the intake passage,-

way on the engine side of sald governor valve,

an air bleed passageway leading from the suction chamber of said suction device and having an air inlet, a valve controlled in accordance with engine speed for controlling said air bleed inlet, said air bleed valve tending to close said air inlet as the engine reaches its governed speed whereby said suction device responds to intake passageway suction and moves the governor valve toward closed position, resilientmeans opposing the closing of said air bleed valve, and means for adjusting the position of the air bleed inlet relative to said speed controlled valve whereby the governed speed of the engine can be changed without adjusting the stress on said resilient means.

MARION MALLORY. 

